Currency values never remain stationary, and it is this dynamic that gave birth to one of the most popular trading strategies of all time, the carry trade. Carry traders hope to earn not only the interest rate differential between the two currencies (discussed above), but also look for their positions to appreciate in value. There have been plenty of opportunities for big profits in the past. Let’s take a look at some historical examples. 
Clearly, leverage should be used judiciously, but even with relatively conservative 10:1 leverage, the 7.5% yield on NZD/JPY pair would translate into a 75% return on an annual basis. So, if you were to hold a 100,000 unit position in NZD/JPY using $5,000 worth of equity, you would earn $9.40 in interest every day. That’s $94 dollars in interest after only 10 days, $940 worth of interest after three months, or $3,760 annually. Not too shabby given the fact that the same amount of money would only earn you $250 in a bank savings account (with a rate of 5% interest) after a whole year. The only real edge the bank account provides is that the $250 return would be risk-free. 
Currencies are traded on the Foreign Exchange market, also known as Forex. This is a decentralized market that spans the globe and is considered the largest by trading volume and the most liquid worldwide. Exchange rates fluctuate continuously due to the ever changing market forces of supply and demand. Forex traders buy a currency pair if they think the exchange rate will rise and sell it if they think the opposite will happen. The Forex market remains open around the world for 24 hours a day with the exception of weekends.
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